CLEAN HARBORS INC Common Stock Shares Outstanding

• CLEAN HARBORS INC showed a decrease of -1.8% in Common Stock Shares Outstanding from 2024 to 2025.
• This data is from CLEAN HARBORS INC's annual report (Form 10-K), filed with the SEC on February 18, 2026.
• XBRL data for this metric is available from 2009 to 2025 (17 years of filings). Earlier data may not exist in machine-readable XBRL format as companies adopted electronic filing at different times.
• Quarterly values from 10-Q filings: Q2 2010: 26.31 million shares | Q3 2010: 26.35 million shares | Q1 2011: 26.45 million shares | Q2 2011: 52.99 million shares | Q3 2011: 53.04 million shares | Q1 2012: 53.26 million shares | Q2 2012: 53.32 million shares | Q3 2012: 53.39 million shares | Q1 2013: 60.49 million shares | Q2 2013: 60.55 million shares | Q3 2013: 60.61 million shares | Q1 2014: 60.72 million shares | Q2 2014: 60.58 million shares | Q3 2014: 59.95 million shares | Q1 2015: 58.66 million shares | Q2 2015: 58.43 million shares | Q3 2015: 57.66 million shares | Q1 2016: 57.55 million shares | Q2 2016: 57.50 million shares | Q3 2016: 57.39 million shares | Q1 2017: 57.19 million shares | Q2 2017: 57.15 million shares | Q3 2017: 56.93 million shares | Q1 2018: 56.24 million shares | Q2 2018: 56.09 million shares | Q3 2018: 56.00 million shares | Q1 2019: 55.83 million shares | Q2 2019: 55.86 million shares | Q3 2019: 55.81 million shares | Q1 2020: 55.55 million shares | Q2 2020: 55.61 million shares | Q3 2020: 55.25 million shares | Q1 2021: 54.55 million shares | Q2 2021: 54.39 million shares | Q3 2021: 54.41 million shares | Q1 2022: 54.41 million shares | Q2 2022: 54.11 million shares | Q3 2022: 54.07 million shares | Q1 2023: 54.09 million shares | Q2 2023: 54.09 million shares | Q3 2023: 54.10 million shares | Q1 2024: 53.93 million shares | Q2 2024: 53.93 million shares | Q3 2024: 53.90 million shares | Q1 2025: 53.64 million shares | Q2 2025: 53.61 million shares | Q3 2025: 53.43 million shares.
• Over the full 17 years of available data (2009 to 2025), CLEAN HARBORS INC's Common Stock Shares Outstanding has grown by 101.6%.
• Historical annual values: Fiscal year 2025: 52.87 million shares | Fiscal year 2024: 53.83 million shares | Fiscal year 2023: 53.93 million shares | Fiscal year 2022: 54.06 million shares | Fiscal year 2021: 54.42 million shares | Fiscal year 2020: 54.77 million shares | Fiscal year 2019: 55.80 million shares | Fiscal year 2018: 55.85 million shares | Fiscal year 2017: 56.50 million shares | Fiscal year 2016: 57.30 million shares | Fiscal year 2015: 57.59 million shares | Fiscal year 2014: 58.90 million shares | Fiscal year 2013: 60.67 million shares | Fiscal year 2012: 60.39 million shares | Fiscal year 2011: 53.18 million shares | Fiscal year 2010: 52.77 million shares | Fiscal year 2009: 26.23 million shares.
• Data sourced from SEC EDGAR public filings as of August 9, 2026.

Last verified: August 9, 2026